The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1981
Filed:
May. 21, 1979
Applicant:
Inventors:
Werner Festag, Schaffhausen, CH;
Hans-Ueli Muller, Schaffhausen, CH;
Assignee:
Swiss Aluminium Ltd., Chippis, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 60 ; 72350 ;
Abstract
The invention concerns a process and a device for manufacturing blisters with high barrier properties from a metal-plastic composite foil which can be deep drawn, in particular from an aluminum-plastic composite foil which is held fast in the clamping facility of a device for manufacturing blisters. In shaping the foil into one or more blisters, pressure is applied pneumatically or pneumatically and hydraulically to at least one side of the foil which stretches onto and over a lubricating layer or easy slip plate on the base of a die.